12156385536 has 81 divisors (see below), whose sum is σ = 35065122001. Its totient is φ = 4050364416.

The previous prime is 12156385519. The next prime is 12156385543. The reversal of 12156385536 is 63558365121.

The square root of 12156385536 is 110256.

It is a perfect power (a square), and thus also a powerful number.

12156385536 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 638 + 5 + 5 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5715360000 + 6441025536 = 75600^2 + 80256^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12156385491 and 12156385500.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5291140 + ... + 5293436.

Almost surely, 2^12156385536 is an apocalyptic number.

12156385536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

12156385536 is the 110256-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12156385536

12156385536 is an abundant number, since it is smaller than the sum of its proper divisors (22908736465).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12156385536 is an frugal number, since it uses more digits than its factorization.

12156385536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616 (or 2302 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 12156385536 in words is "twelve billion, one hundred fifty-six million, three hundred eighty-five thousand, five hundred thirty-six".